Finding the Fourth Proportional to 5,434.40, 7,488.72 and 3,858.08

Step by Step Solution

1. Step 1: Write the proportion equation
   5,434.40 : 7,488.72 = 3,858.08 : x
2. Step 2: Convert to fraction form
   5,434.40/7,488.72 = 3,858.08/x
3. Step 3: Cross multiply
   5,434.40x = 7,488.72 × 3,858.08
4. Step 4: Simplify right side
   5,434.40x = 28,892,080.86
5. Step 5: Solve for x
   x = 28,892,080.86/5,434.40
6. Step 6: Final answer
   x = 5,316.52